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Find the area of a quadrant of a circle whose circumference is 22cm.[Use π=22/7]  

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Let the radius of the circle be r.

Circumference = 22 cm                                         

2πr = 22                                                  

r = 22/2π=11/π  

Quadrant of circle will subtend 90° angle at the centre of the circle.

Area of such quadrant of the circle 

=1/4 x π x (11/π)2

=1/4π x 121

= 77/8 cm2

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